Automatic pressure-operated valve.



M. P. STEVENS.

AUTUMA-TIG PRESSURE OPERATED VALVE.

APPLmATIoN FILED Novnzu. 1311A Z SHEETS-SHEET 1.

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AUTOMATIC PRESSURE UPERATBD VALVE.

AILIIIATIUN'PILED NCNZU 1911.

1,060,142, Patented Apr. 29, 1913.

2 SHEETSSHEBT Z,

indicated at 17, communicates with the outlet bore of the plug 3, and the other of which constitutes apressure chamber 18, in which the rear face o f the piston valve is exposed to the pressure of the tank. In

Ithls chamber 17, which communicates with the bore of the plug 3, is an inlet opening 19 which is normally uncovered by the' piston valve, and `through which the fluid or gas from the tank may enter the chamber 17 and pass to said bore, and in rear of the piston valve the chamber 18 is formed with two sets of openings 19, .20, respectively, the former being 'located adjacent the rear face ofthe valve andthe latter adjacent the rear endof the chamber where they. cannot be closed by the valve.

During the normal operation of the-.valve the parts are in the position shown in Fig.

1, the valve being held in this position by the opposing springs 13, 14, so that the v valve is inrear of the opening 19 and the latter is uncovered, giving free access of the contents of the tank to the chamber 17 to flow through thebore of'the -plug 3. When the parts are in this position the con,` tents of the tank How freely through the opening 19 and the bore of theplug 3 to the conduit or system, and as long as the latter remains intact the valve will mainlber 17, and then engagin said annular valve seat 1.0` to completely 's ut. olf communication between 'the plug 3 and the tank, as shown in Fig. 3. The openin sin the cham- V ber 18-are preferably of suc size that the iiuid or gas may always have free" access to saidl chamber.v The same operation takes place when the distributing pipe is disconnected from the tank, the valve in this case automatically operating to close exit of the contents of the tank. n

The face of the valve isl preferably made of leather, rubber or similar material, and

-the face of the valve "seat l0a is corrugated,

so that a fluid and as ti ht en a ment'ma be made between te valgiie and st. As heretofore stated the valve just described is eiiicient as a charging valve when the tank is to be filled. In this instancethe 4filling' tube is connected to the couplingv 3, andthe greatest pressure being onA the face of thevalve 12 toward the seat 10, the valve 12 will be forced back until it uncovers the ports 19, so that the gas or iiuid may freely enter the tank. I preferably ma e these openings 19a of such area that the Huid or gas mav ow freely to the tank.

from the tank into the distributing pipe will raise the pressure in said pipe, and the valve chamber to move the plston valve to uncover gas rom the tank to the distributing pipe.

The embodiment of the invention above described is a form of the invention adapted for connecting a conduit with a tank and I will now proceed to describe a form adapted to be inserted at any desired point in a pipp line.

eferring -particularly to Figs. 5 and 6, 21 designates a coupling adapted to be inserted in a pipe line having threaded sockets 22, 23, respectively, the former of which is adapted to receive an inlet plipe 24, and the latter an outlet pipe 25. T is coupling is rovided at one end with a threaded socket 26 and an annular shoulder 27 which receives a plug 28 1n threaded engagement with -said socket and abutting said shoulder, said plug projecting at its inner end into an -enlarged chamber 29 which communicates at its opposite end through an opening 30 with the inlet pipe. At its inner end said plug is provided with an annular valve seat 31, and a transverse diaphragm 32 formed with ports 33 and a central guide opening 34 for a purpose to be presently described. j At thefinner end surrounding the valve seat the plu is reduced to form a shoulder 35, and at this reduced end ortion, surrounding the valve seat' and a utting said shoulder,'is a cylindrical jacket 36 having an end' wall 37 formed with a ort 38 openin toward the inlet pipe. In t e side Wall o this jacket intermediate the valve seat and. said end wall is an inlet port 39, with which coperates a iston valve 40 having a plunger rod 41 lgulded in the guide opening of the diaphragm in the plug, and surroundin this rod is an expansive spring 42 which a uts the diaphragm and the piston valve to normally hold the latter in position to uncover the inlet openinr so that lthe latter may communicate through the interior of the jacket with the ports in the diaphragm of the plug'. It w1ll be understood that the iston valve closely tits the interior of the jacket and normally divides the same intotwo chambers, one of which is in communication' with the outlet plug and the other of which constitutes a pressure chamber so that the rear face of the valve, or that away from the valve seat, isfexposed to the pressure of the fluid in the inlet ipe and the enlarged chamber of he coupiing.

lthe ort 19 and permit free passage of the win the casing having a conical end adapted medias The spring heretofore described operates to normally hold the 'piston valve in position to uncover `the inlet so that uid or gas from the chamber of the coupling may flow into the outlet chamber vand thence through the diaphra m to the outlet pipe. In order to control t e area -of the inlet opening I may provide a valve, which forpurposes of simplicity is shown as consistin of al screw lug inserted through 'a threa ed opening to coperate with said inlet to enlarge or reduce the area of the same opening to the flow of the fluid'or gas.

The normal position of the valve is that shown in Fig. 4:, and while the valve is in this position the gas or fluid is free to flow from the inlet pipe, through the coupling, the inlet opening, the outlet chamber of the diaphragm to the outlet pipe, and'its flow is possible as long as the pressure in the outlet pipe is suiiicient to permit the spring to hold the valve in the position shown. Should. the ressure in the outlet pipe' be reduced, as flbr instance by breakage of the pipe, Aor a leak, the excess of pressure in the pressure chamber over the combined force of the spring and the pressure on the outlet side ofI the valve will operate to urge the valve to its seat, whereby flow from the inlet to the outlet pipe iscut 0H.

What I claim and desire to secure by Letters Patent of the United States is 1. A valve of the class described comprising a tubular casing, a piston valve in the casing and closely fitting the same and thereby separating the same into two chambers out of communication with each other through the casing, one of said chambers having an'outletand a valve seat with which the valve is coperable to control said outlet, said outlet chamber having an inlet in its side wall opening exterior t0 the casing adapted to be covered and uncovered by the side face of said valve, and the chamber on the opposite side ofthe piston valve having an inlet opening exterior to the'casing.

2. A valve of the class described comprising a tubular casing, a piston valve in the casing and closely fitting the same and thereby separating the same into two chambers out of communication with each other through the casing, one of said chambers having an outlet and valve seat with which the valve is coperable to control said out-l having an inlet opening 'exterior to the casmg, and means forurgmg the plston valve` to a position to uncover the inlet to the out- .the casing, one of said chambers having an outlet and a valve seat with which the valve is coperable to control .said outlet, said outlet chamber having an inlet in its side wall openingexterior to the casing and adapted to be covered and uncovered by the side face of said piston valve, and the chamber on the opposite side4 of` the valve having an inlet opening exterior to the casing, and a spring for urging the piston valve away from said outlet to a posltion to uncover the inlet to the outlet chamber.

4. A valve of the class described comprising a'tubular casin a piston valve in the casing andclosely tting the same and thereby separating the same into two chambers out of communication with each other through the casing, one of said lchambers having an outletand a valve seat with which the valve is coperable to control said outlet, said outlet chamber having an inlet opening exterior to the casing and adapted to be covered and uncovered b the side face of said piston valve, and the c amber on the opposite side of the valve having an inlet opening exterior to the casing, and a spring in each chamber to determine the position of the valve relative t9 the chamber inlets.

5. A valve of the class described comprising a tubular casing, apiston valve in the casing separating the same into two chambers, one of the chambers having an outlet surrounded by an annular valve seat with which the valve is adapted to coperate, an opening lthrough the Wall of the chamber having ythe outlet adapted to be covered and IOO with an openingof greater area than said first-named openlng, and springs acting to normally hold the valve away from its seat and clear of the opening through the Wall of the outlet chamber.

' '6. A valve of the class described comprising a tubular casing, a piston valve inthe casing dividing the same into two chambers, one of said chambers having an outlet surrounded by an annular valve seat with which said piston cooperates, an openin through the casing wall of the outlet cham r adapted to be covered and uncovered by the valve, an inlet through the wall of the opposite chamber, rods connected to the valve and projecting longitudinally of-the said charnbers, and springs on said rods engaging the piston and abutments in the chambers respectively to normally maintain said valve in position to uncover the inlet to the outlet chamber.

7. A valve of the class described comprismean's whereby a reduction of nal bore, a sleeve inounte'd on the coupling f and surrounding the same, thevsurrounded portion of the coupling constitutlng an ailnular valve seat, 'a piston valve movable longitudinally of said'sleevel and normally dividing the same into two chambers, one of which is provided with an inlet through its wall communicat-ing through the sleeve with the bore of said coupling, and the other chamber provided with an inlet, and ressure on the coupling side of the piston will move the piston to close the inlet opening to the outlet chamber.I g g 8. In combination a tank, a valve opening through thetank wall comprising a casing, a piston valve separating the casing into two chambers, one of which has an outlet `.through the tank wall surrounded by an annular valveseat with which said valve is coperable, said outlet chamber having a port opening into the tank, and the chamber Vonfthe opposite side of the valve from the outlet havlng a port opening into the tank.

9. AA valve of the class described comprising a2 casing shell, a piston valve within the shell and closely fitting thesame, and dividing the shell into two chambers, one of which is provided-with anl outlet anda valve seat concentric with the shell, with which seat the valve is coperable, the chamber on the outlet side of thepiston valve having aninlet, and the chamber on the opposite side of the valve having an opening. y

10. In combination a tank, a valve casing opening through the tank wall, a piston valve separating the casing into two chambers, one of which has an outlet through the tank Wall' surrounded by an annular valve seat with which said valve iscoperable, the

chamber on the outlet side of the valve having an opening into the tank, and means whereby the opposite side of the piston from the outlet is subjected to the pressure of the 4 tank.

11. In a valve of lthe class described, a casing having an out-let, `and an inlet throughthe casing wall communicating with said outlet, and a lling passage in- 5 dependent of the' ysaid inlet, said filling passage also communicating with the outlet, means for controlling communication between said inlet and the outlet and the illing passage and the outlet, means for nor- 5 mally operating said first-named means to establish communication between the Ainlet and the outlet and to cut 0E communication between said lling passage andthe outlet,

said first-named means being pressure ope'r-l 6 ated to establish communication between the filling passage and the outlet.

12..A 'valve of the class describedcomprising'a casing, apiston Valve within the casi-ngland closely fitting Ithe same and divid-v A6 ing t e same into 4two chambers, one of which is provided with an outlet and a valve seat with which seat the valve is coperable to control saidy outlet, the chamber on the outlet side of the piston valve having an 7 inlet, and the chamber on 'the opposite side of the valve having an opening communicating with the interior thereof.

13. A valve comprisin a casinghaving a passage serving as a com ined inlet and out- 7 let, means to normally cause 'a restricted flow outward from the casing through the combined inlet and outlet, 'and pressure-controlled means for permittin an increased flow inward through the com ined inlet and S outlet when' the same is emplo ed as an inlet.

In testimony whereof I ave hereunto signed my name in the presence of two subscribing witnesses.y 4 v MERTONA P. STEVENS.

Witnesses:

H. D.V MURPHY, ,i v WALDo M. BROWN. 

